I have been playing with the friend (he is the host) for a long time. However, after one restart, I'm not able to connect. When I try to connect by IP, the world starts downloading, and when it reaches 37% appears the message "waiting for a server". But after all, I get the message "the host has quit the game".

(we tried to create a new world, and it was successful, we both could play)(the host can play in this world without problems)(i got the world files and I also can play without problems)